Chiral quasiparticle tunneling between quantum Hall edges in proximity with a superconductor
Abstract
© 2019 American Physical Society. We study a two-terminal graphene Josephson junction
with contacts shaped to form a narrow constriction, less than 100nm in length. The
contacts are made from type-II superconducting contacts and able to withstand magnetic
fields high enough to reach the quantum Hall regime in graphene. In this regime, the
device conductance is determined by edge states, plus the contribution from the constricted
region. In particular, the constriction area can support supercurrents up to fields
of ∼2.5T. Additionally, enhanced conductance is observed through a wide range of magnetic
fields and gate voltages. This additional conductance and the appearance of supercurrent
is attributed to the tunneling between counterpropagating quantum Hall edge states
along opposite superconducting contacts.
Type
Journal articleSubject
Science & TechnologyTechnology
Physical Sciences
Materials Science, Multidisciplinary
Physics, Applied
Physics, Condensed Matter
Materials Science
Physics
JOSEPHSON-JUNCTIONS
GRAPHENE
SUPERCURRENT
Permalink
https://hdl.handle.net/10161/19633Published Version (Please cite this version)
10.1103/PhysRevB.100.121403Publication Info
Wei, MT; Draelos, AW; Seredinski, A; Ke, CT; Li, H; Mehta, Y; ... Borzenets, IV (2019). Chiral quasiparticle tunneling between quantum Hall edges in proximity with a superconductor.
Physical Review B, 100(12). 10.1103/PhysRevB.100.121403. Retrieved from https://hdl.handle.net/10161/19633.This is constructed from limited available data and may be imprecise. To cite this
article, please review & use the official citation provided by the journal.
Collections
More Info
Show full item recordScholars@Duke
Anne Draelos
Postdoctoral Associate
Gleb Finkelstein
Professor of Physics
Gleb Finkelstein is an experimentalist interested in physics of quantum nanostructures,
such as Josephson junctions and quantum dots made of carbon nanotubes, graphene, and
topological materials. These objects reveal a variety of interesting electronic properties
that may form a basis for future quantum devices.
Alphabetical list of authors with Scholars@Duke profiles.

Articles written by Duke faculty are made available through the campus open access policy. For more information see: Duke Open Access Policy
Rights for Collection: Scholarly Articles
Works are deposited here by their authors, and represent their research and opinions, not that of Duke University. Some materials and descriptions may include offensive content. More info